the wise lord, Ahura Mazda, ‘first father of the Righteous Order, who gave to the sun and stars their path,’ and an independent evil principle, Angra Mainyu, the Deceiver, principle of the lie
Campbell establishes Ahura Mazda as the defining pole of Zoroastrian ethical dualism, whose conflict with Angra Mainyu structures the entire moral cosmos and the individual’s duty to choose the good.
, Oriental Mythology: The Masks of God, Volume II, 1962thesis